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CsipSimple works on Cell Phones. Why there is anything to do with PPPoE fiber connection? Did you use direct IP call or SIP call via proxy server? By the way,...

I assume you are using a SIP Server somewhere. Please be specific. It could happen that the carrier has installed a more restricted NAT, which failed your CsipSimple registration to...

Have you tried it out using 3G/4G? Did it work fine? It worth the try.

You may need to have the server folks to look into their registration/call trace logs. Or, you may need to have Wireshark to trace the SIP messages., which seems too...

Internode folks are NOT telling you the truth or they are not qualified engineers. If your calls did get through, the SIP Server definitely has involved in the call processing,...

Are you sure of your experiments? Did all calls with mobile network behave the same?

If you make calls to non-existing addresses, the same thing may happen: it takes a long time to hangup calls. It might not have anything to do with the mobile...

So, there are something really different between Mobile and WiFi. The most suspicious one may be with NAT/Firewall. Many mobiles adopt symmetric NAT, causing a lot of issues such as...

This issue has been addressed before. Please refer to https://github.com/r3gis3r/CSipSimple/issues/44.

If anybody has done the update development, please share with the community to allow efforts on the "real CsipSimple code", instead of the SSL/Google/build nonsense.